Binocular periscope.



C. H. BEDELL.

BINOGULAR PEBISGOPE. APPLIUATION FILED Nov. 4. 1909.

-Panea Apr. 5, 1910.

2 SHEETS-SHEET 1 C. H. BEDELL. BINOUULAR PEVRISGOPE. uPLIoATIoN FILED NOVA, 1909.

Patented Apr.5,1910.

2 SHEETS-SHEET 2.

I INVENTOR MM l ATTORNEY)` 'n UNITED sTATEs PATENT OFFICE.

yCHARLES H. BEDELL, oF QUINCY, MASSACHUSETTS.

BINOCULAR PERISCOPE.

' a practicable binocular periscope forsubmarine boats andthe like, and to this end I have provided a single periscope tube requiring no greatery diameter,` ol'ering no more resistanceto the water than the ordinary monocular periscpe tube, and having the ordinary objective system, in combination with a rism within the tube for deflecting a su cient portion of the rays to forma second image, a second lens or prism `for bringing these deflected rays into parallelism with the iindeflected rays which form the first image, an. a binoculareyepiece for observing the two images.

preferred practical embodimentof them,

- of the imag :is formed. In accordance with my invention Ka dewill be more fully understood from the following description and the accompanying drawings. 5

In the drawings, Figures 1, and 2 arek diagrams, at right angles to oneanOther, of a convenient arrangement of lenses for carrying out my invention; Fig. 3 is a central vertical section of the tube and its support in thevconning tower; Fig. 4 is a detail section on a larger scale on the line 4-4 of Fig. 5, and Fig. 5 is a detail plan on the line 5 5 of Fig. 4.

In Figs. 1 and 2 the lenses a, b and c represent the ordinary objective combina.

tion, and the total reflecting prism d serves to deflect the-rays down the periscope tube, the image .being formed at e, as indicated- `.by the arrow. After the light passes' the focal plane at 'e it continues down the tube and strikes the projecting lens f which serves as usual to project the light 'rays to the focal pl e at g, where a' reproduction fleeting Vprism 'is interposed in the path of the light rays and serves to deflect half of them toone side. InV Fig. 2 this prism is' shown at h, as a separate piece, though in Specification of Letters Patent.

Application led November 4, 1509.

Patented Apr. .5', 1910. serial No. 526,270;

some cases it is desirable to grind it in a single piece with` the projecting lens f. A second deilecting prism is placed in the path of the-rays deflected by prism L for the purpose of bringin them into parallelism with the undeecte rays, the relative posi# tions of prisms h, and z', and the angle of delection, being such that the deflected rays form av separate image at g at one side of the first image andfar enough apart therefrom to permit the observatlon of the two images through the Vbinocular eye-piece represented at 7c. The total reflecting prisms Z, which may conveniently be made 1n a sin-4 gle piece if desired, are interposed for the usual purpose of bringing the images in positionl to be observed through the horizontal eye piece.

From Figs. 3, 4 and 5 it will be seen that the periscope tube m is, at its upper portion, of the usua type, mounted in the usual manner in the front of conning tower n, but at its lower end, and Within the vessel, the tube is spread out laterally for the reception of deflecting prisms k and z', and is provided vwith the binocular eye-piece lc. The princlples of the; 1nvent1on,and av` for observing the two images; substantially as described.

2..A binocular periscope .for submarine boats or the like, having at its upper end an objective system o'f lenses and a total-reflectingsurface for delecting the light rays down the periscope tube, in combination with a. detlectingprisfm in the path-of the light ra s for de cting a portiony thereof, a secon deliecting prism .for bringing the deflected rays into parallelism with the undelected rays', tota deflect-ing the two pencils of rays, laterally,

and a laterally-extending binocular eye piece:

for 'observing the two images so produced; substantially as described.

3. A binocular boats and the like, aving a single tube and having at its upper end an objective system` of lenses 'and a total-reflecting surfaceforl delecting thel light rays down thejperiscope reflecting surfaces for periscope for submarineV tube, said tube being enlarged laterally `at the side of the tubenear its lower end for its` lower end, a deflecting rism in the path observing the images so produced substanof the light rays for de ecting a portion tially as described.

thereof intothe lateral enlargement, a sec- In testimon whereof I'aflix my signature,

5 ond deiecting prism in the lateral enlargein presence o two Witnesses.

ment for bringing the deflected rays into parallelism with the undeected rays, total- CHARLES H' BEDELL' reflecting surfaces at the bottom of the tube Witnesses: for deflecting the two sets of rays horizonf F. L. BRAKE,

10 tally, and a binocular eye piece attached to W. D. FESLER. 

